text: Most people think that we have 5 senses: smell, taste, touch, hearing, and sight. But the fact of the matter is that we have many more senses than those 5, and one of those other senses is called [proprioception](_URL_0_). In a nutshell, there are stretch receptors in muscles and joints that let you know exactly how much force is being applied by a muscle, and exactly how stretched a ligament is. With that information, plus balance from your inner ear, and plain old practice, you are able to tell the relative positions of the different parts of your body with fairly good precision.